Question

I tried the following code in IE9, Chrome. But it is not working in both browsers.

In Firefox, it is working fine

<script type="text/javascript">
    var first = ['a','b','c','h','i','j'];
    var second = ['d','e','f','g'];
    var insertPosIndex = 3;
    first.splice.apply(first, Array.concat(insertPosIndex, 0, second));
    alert(first);
</script>

I am expecting the output as a,b,c,d,e,f,g,h,i,j

Answer 1

<script type="text/javascript">
    var first = ['a','b','c','h','i','j'];
    var second = ['d','e','f','g'];
    var insertPosIndex = 3;
    first.splice.apply(first, [].concat(insertPosIndex, 0, second));
    alert(first);
</script>

According to a bug, read about it here using [] instead of Array is the work around for Chrome.

This will work in Firefox, IE9 and Chrome.